利用固体与分子经验电子理论（EET），计算镍基单晶合金的电子结构参数。根据计算结果，从电子层次探讨Re强化镍基合金的微观机理。结果表明：镍基合金中加入Re元素，基体和增强体的电子结构参数 nA′均不同程度增大，使γ与γ′相的结构单元中原子键结合能力增强；使镍基合金γ与γ′相的原子状态数σN均增大，增加了基体和增强相的稳定性；γ与γ′相界面的原子状态组数增加，进而提高了合金的蠕变强度。
Electronic structure parameters of phase and phase interface were calculated by EET method. Based on the calculation results,the strengthening mechanism of Re on Ni?based single crystal superalloy was discussed. The results show that with the addition of Re,the nA′ and σN of γ and γ′ increase. For the phase interface,the addition of Re increases the σ of γ/γ′ interface. All these increase the microstructure stability and the creep strength of the alloy.
参考文献
| [1] | 胡壮麒,刘丽荣,金涛,孙晓峰.镍基单晶高温合金的发展[J].航空发动机,2005(03):1-7. |
| [2] | Blavette D;Caron P;Khan T.An atom-probe study of some fine-scale microstructural features in Ni-based single crystal super-alloys[A].Warrendale:TMS,1988:305-314. |
| [3] | Erickson G L.The development and application of CMSX-10[A].Warrendale:TMS,1996:35-44. |
| [4] | Giamei A F;Anton D L .Rhenium additions to a Ni-base super-alloy:effets on microstructure[J].Metallurgical Transactions,1985,16A:1997-2005. |
| [5] | Harris K;Erickson G L;Sikkenga S L.Development of the rhe-nium containing superalloys CMSX-4&CM 186 LC for single crystal blade and directionally solidified vane applications in advanced turbine engines[A].Warrendale:TMS,1992:297-306. |
| [6] | Zhu Tao;Wang Chongyu;Gan Yong .Effect of Re in γ phase,γ′phase and γ/γ′ interface of Ni-based single-crystal superalloys[J].Acta Materialia,2010,58:2045-2055. |
| [7] | Zhang Xu;Wang Chongyu .First-principles study of vacancy formation and migration in clean and Re-doped γ′-Ni3Al[J].Acta Materialia,2009,57:224-231. |
| [8] | Karunaratne M S A;Carter P;Reed R C .Interdiffusion in the face-centered cubic phase of the Ni-Re,Ni-Ta and Ni-W sys-tems between 900℃ and 1300℃[J].Material Science and Engineering,2000,281:229-233. |
| [9] | 彭平,陈律,周惦武,田泽安,韩绍昌,金涛,胡壮麒.Re与Ru合金化对Ni/Ni3Al相界电子结构影响的第一原理研究[J].金属学报,2007(02):137-143. |
| [10] | 林成,刘志林.价电子结构参数的统计值在钛合金相变温度及共析转变研究中的应用[J].中国科学E辑,2009(02):214-223. |
| [11] | 刘志林;李志林;刘伟东.界面电子结构与界面性能[M].北京:科学出版社,2002:36-58. |
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